@Nullable
private InputStreamPipe openCacheInputStreamPipe(int index) {
if (sCache == null) {
return null;
}
String key = EhCacheKeyFactory.getImageKey(mGid, index);
return sCache.getInputStreamPipe(key);
}
private boolean copyFromCacheToDownloadDir(int index) {
if (sCache == null) {
return false;
}
UniFile dir = getDownloadDir();
if (dir == null) {
return false;
}
// Find image file in cache
String key = EhCacheKeyFactory.getImageKey(mGid, index);
InputStreamPipe pipe = sCache.getInputStreamPipe(key);
if (pipe == null) {
return false;
}
OutputStream os = null;
try {
// Get extension
String extension;
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
pipe.obtain();
BitmapFactory.decodeStream(pipe.open(), null, options);
pipe.close();
extension = MimeTypeMap.getSingleton().getExtensionFromMimeType(options.outMimeType);
if (extension != null) {
extension = '.' + extension;
} else {
return false;
}
// Fix extension
extension = fixExtension(extension);
// Copy from cache to download dir
UniFile file = dir.createFile(generateImageFilename(index, extension));
if (file == null) {
return false;
}
os = file.openOutputStream();
IOUtils.copy(pipe.open(), os);
return true;
} catch (IOException e) {
return false;
} finally {
IOUtils.closeQuietly(os);
pipe.close();
pipe.release();
}
}